/* ═══════════════════════════════════════════════════════
   Ciracon – Shared Stylesheet
   Modern AI Infrastructure Consultancy
   ═══════════════════════════════════════════════════════ */

/* ── Design Tokens ── */
:root {
  /* Backgrounds */
  --bg-primary: #0B0F14;
  --bg-secondary: #111827;
  --bg-light: #F9FAFB;
  --bg-card-dark: #1a2233;
  --bg-card-light: #FFFFFF;

  /* Accents */
  --accent: #3B82F6;
  --accent-hover: #2563EB;
  --accent-soft: rgba(59, 130, 246, 0.1);
  --accent-secondary: #14B8A6;
  --accent-muted: #6366F1;

  /* Text */
  --text-primary: #0F172A;
  --text-secondary: #6B7280;
  --text-light: #E5E7EB;
  --text-muted-light: #9CA3AF;
  --text-heading-dark: #F9FAFB;

  /* Borders */
  --border-dark: #1E293B;
  --border-light: #E5E7EB;

  /* Typography */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

  /* Spacing */
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 1.5rem;
  --space-lg: 2rem;
  --space-xl: 3rem;
  --space-2xl: 4rem;
  --space-3xl: 6rem;
  --space-4xl: 8rem;

  /* Layout */
  --max-width: 1200px;
  --max-width-narrow: 800px;

  /* Effects */
  --transition: 200ms ease;
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
  --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.1);
  --shadow-lg: 0 10px 30px -5px rgba(0,0,0,0.15);
  --shadow-glow: 0 0 40px rgba(59,130,246,0.15);
  --radius: 8px;
  --radius-lg: 12px;
}

/* ── Reset ── */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  color: var(--text-primary);
  background: var(--bg-primary);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
ul, ol { list-style: none; }
button { font: inherit; cursor: pointer; }


/* ═══════════════════════════════════════════════════════
   Navigation
   ═══════════════════════════════════════════════════════ */

.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 1rem 2rem;
  background: rgba(11, 15, 20, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid transparent;
  transition: background 0.3s ease, border-color 0.3s ease, padding 0.3s ease;
}

.nav.nav-scrolled {
  background: rgba(11, 15, 20, 0.95);
  border-bottom-color: var(--border-dark);
  padding-top: 0.75rem;
  padding-bottom: 0.75rem;
}

.nav-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  font-family: var(--font-mono);
  font-size: 1rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-light);
}

.logo .accent {
  color: var(--accent);
}

.nav-links {
  display: flex;
  gap: 2rem;
  align-items: center;
}

.nav-links a {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-muted-light);
  transition: color var(--transition);
  letter-spacing: 0.01em;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--text-light);
}

.nav-cta {
  padding: 0.5rem 1.25rem !important;
  background: var(--accent) !important;
  color: #fff !important;
  border-radius: var(--radius);
  font-weight: 600 !important;
  transition: all var(--transition) !important;
}

.nav-cta:hover {
  background: var(--accent-hover) !important;
  transform: translateY(-1px);
  box-shadow: var(--shadow-glow);
}

/* Mobile toggle */
.nav-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--text-light);
  padding: 0.5rem;
}

.nav-toggle svg { display: block; }


/* ═══════════════════════════════════════════════════════
   Sections & Containers
   ═══════════════════════════════════════════════════════ */

.section {
  padding: var(--space-4xl) var(--space-lg);
}

.section-dark {
  background: var(--bg-primary);
  color: var(--text-light);
}

.section-darker {
  background: var(--bg-secondary);
  color: var(--text-light);
}

.section-light {
  background: var(--bg-light);
  color: var(--text-primary);
}

.section-white {
  background: #fff;
  color: var(--text-primary);
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  width: 100%;
}

.container-narrow {
  max-width: var(--max-width-narrow);
  margin: 0 auto;
  width: 100%;
}


/* ═══════════════════════════════════════════════════════
   Typography
   ═══════════════════════════════════════════════════════ */

.eyebrow {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: var(--space-sm);
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

.eyebrow-accent {
  color: var(--accent);
}

.eyebrow-dark {
  color: var(--text-muted-light);
}

.eyebrow-light {
  color: var(--text-secondary);
}

.eyebrow-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
}

h1, .h1 {
  font-size: clamp(2.5rem, 6vw, 4rem);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.03em;
}

h2, .h2 {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.02em;
}

h3, .h3 {
  font-size: 1.25rem;
  font-weight: 600;
  line-height: 1.3;
  letter-spacing: -0.01em;
}

h4, .h4 {
  font-size: 1.125rem;
  font-weight: 600;
  line-height: 1.4;
}

.text-gradient {
  background: linear-gradient(135deg, var(--accent), var(--accent-secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.lead {
  font-size: 1.25rem;
  line-height: 1.7;
  font-weight: 400;
}

.text-secondary-dark { color: var(--text-muted-light); }
.text-secondary-light { color: var(--text-secondary); }


/* ═══════════════════════════════════════════════════════
   Buttons
   ═══════════════════════════════════════════════════════ */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  font-size: 0.9375rem;
  font-weight: 600;
  border-radius: var(--radius);
  border: none;
  transition: all var(--transition);
  cursor: pointer;
  text-decoration: none;
}

.btn-primary {
  background: var(--accent);
  color: #fff;
}

.btn-primary:hover {
  background: var(--accent-hover);
  transform: translateY(-2px);
  box-shadow: var(--shadow-glow);
}

.btn-secondary {
  background: transparent;
  color: var(--text-light);
  border: 1px solid var(--border-dark);
}

.btn-secondary:hover {
  border-color: var(--text-muted-light);
  background: rgba(255,255,255,0.03);
}

.btn-secondary-light {
  background: transparent;
  color: var(--text-primary);
  border: 1px solid var(--border-light);
}

.btn-secondary-light:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.btn-ghost {
  background: transparent;
  color: var(--accent);
  padding: 0;
}

.btn-ghost:hover {
  opacity: 0.8;
}

.btn svg {
  transition: transform var(--transition);
}

.btn:hover svg {
  transform: translateX(3px);
}

.btn-group {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
}


/* ═══════════════════════════════════════════════════════
   Hero
   ═══════════════════════════════════════════════════════ */

.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  padding: 10rem 2rem 0;
}

.hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.hero-gradient {
  position: absolute;
  width: 600px;
  height: 600px;
  border-radius: 50%;
  filter: blur(120px);
  opacity: 0.15;
}

.hero-gradient-1 {
  top: -10%;
  right: -5%;
  background: var(--accent);
}

.hero-gradient-2 {
  bottom: -20%;
  left: -10%;
  background: var(--accent-muted);
}

.hero .grid-overlay {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(59,130,246,0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(59,130,246,0.03) 1px, transparent 1px);
  background-size: 60px 60px;
}

.hero-content {
  position: relative;
  z-index: 10;
  max-width: 700px;
  text-align: center;
  margin: 0 auto;
}

/* Capability line above headline */
.hero-capabilities {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: var(--space-lg);
}

.hero-title {
  margin-bottom: var(--space-lg);
  color: var(--text-heading-dark);
  line-height: 1.15;
}

.hero-description {
  font-size: 1.25rem;
  color: var(--text-light);
  line-height: 1.7;
  max-width: 600px;
  margin: 0 auto var(--space-md);
}

.hero-subline {
  font-size: 1.0625rem;
  color: var(--text-muted-light);
  margin-bottom: var(--space-xl);
}

.hero-actions {
  display: flex;
  gap: var(--space-sm);
  justify-content: center;
  flex-wrap: wrap;
}

.hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-lg);
  margin-top: var(--space-2xl);
  padding-top: var(--space-lg);
  border-top: 1px solid var(--border-dark);
}

.hero-meta-item {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted-light);
  letter-spacing: 0.05em;
}

.hero-meta-item strong {
  display: block;
  font-size: 1.25rem;
  color: var(--text-light);
  font-family: var(--font-sans);
  margin-bottom: 0.25rem;
}


/* ═══════════════════════════════════════════════════════
   Page Header (for inner pages)
   ═══════════════════════════════════════════════════════ */

.page-header {
  padding: 8rem 2rem 4rem;
  background: var(--bg-primary);
  border-bottom: 1px solid var(--border-dark);
}

.page-header .container {
  max-width: var(--max-width);
}

.page-header h1 {
  color: var(--text-heading-dark);
  margin-bottom: var(--space-md);
}

.page-header .lead {
  color: var(--text-muted-light);
  max-width: 650px;
}


/* ═══════════════════════════════════════════════════════
   Section Headers
   ═══════════════════════════════════════════════════════ */

.section-header {
  margin-bottom: var(--space-3xl);
}

.section-header h2 {
  margin-bottom: var(--space-sm);
}

.section-header .lead {
  max-width: 650px;
}

.section-header-centered {
  text-align: center;
}

.section-header-centered .lead {
  margin-left: auto;
  margin-right: auto;
}


/* ═══════════════════════════════════════════════════════
   Cards
   ═══════════════════════════════════════════════════════ */

/* Dark card */
.card {
  background: var(--bg-card-dark);
  border: 1px solid var(--border-dark);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

.card:hover {
  border-color: rgba(59,130,246,0.3);
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(0,0,0,0.2);
}

.card-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-md);
  background: var(--accent-soft);
  color: var(--accent);
}

.card h3 {
  color: var(--text-heading-dark);
  margin-bottom: var(--space-sm);
}

.card p {
  color: var(--text-muted-light);
  font-size: 0.9375rem;
  line-height: 1.7;
}

.card-link {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--accent);
  margin-top: var(--space-md);
  transition: gap var(--transition);
}

.card-link:hover {
  gap: 0.625rem;
}

/* Light card */
.card-light {
  background: var(--bg-card-light);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  transition: all 0.3s ease;
}

.card-light:hover {
  border-color: var(--accent);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.card-light h3 {
  color: var(--text-primary);
  margin-bottom: var(--space-sm);
}

.card-light p {
  color: var(--text-secondary);
  font-size: 0.9375rem;
  line-height: 1.7;
}


/* ═══════════════════════════════════════════════════════
   Grids
   ═══════════════════════════════════════════════════════ */

.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-lg);
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-lg);
}

.grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-lg);
}

.grid-2-1 {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: var(--space-2xl);
  align-items: start;
}

.grid-1-1 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3xl);
  align-items: center;
}


/* ═══════════════════════════════════════════════════════
   Feature List / Bullet Styles
   ═══════════════════════════════════════════════════════ */

.feature-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.feature-list li {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  font-size: 0.9375rem;
  line-height: 1.6;
}

.feature-list li::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
  margin-top: 0.5rem;
  flex-shrink: 0;
}

.feature-list-dark li { color: var(--text-muted-light); }
.feature-list-light li { color: var(--text-secondary); }


/* ═══════════════════════════════════════════════════════
   Tags / Chips
   ═══════════════════════════════════════════════════════ */

.tag {
  display: inline-flex;
  align-items: center;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  padding: 0.3rem 0.625rem;
  border-radius: 4px;
  letter-spacing: 0.05em;
}

.tag-dark {
  background: rgba(59,130,246,0.1);
  color: var(--accent);
  border: 1px solid rgba(59,130,246,0.15);
}

.tag-light {
  background: var(--bg-light);
  color: var(--text-secondary);
  border: 1px solid var(--border-light);
}

.tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}


/* ═══════════════════════════════════════════════════════
   Engagement / Case Study Cards
   ═══════════════════════════════════════════════════════ */

.engagement-card {
  border: 1px solid var(--border-dark);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all 0.3s ease;
}

.engagement-card:hover {
  border-color: rgba(59,130,246,0.3);
  box-shadow: 0 8px 30px rgba(0,0,0,0.2);
}

.engagement-card-header {
  padding: var(--space-xl);
  background: var(--bg-card-dark);
  border-bottom: 1px solid var(--border-dark);
}

.engagement-card-header h3 {
  color: var(--text-heading-dark);
  margin-bottom: var(--space-xs);
}

.engagement-card-header p {
  color: var(--text-muted-light);
  font-size: 0.9375rem;
}

.engagement-card-body {
  padding: var(--space-xl);
  background: var(--bg-secondary);
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: var(--space-lg);
}

.engagement-card-body > div {
  font-size: 0.9375rem;
}

.engagement-card-body h4 {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: var(--space-sm);
}

.engagement-card-body p {
  color: var(--text-muted-light);
  line-height: 1.7;
}


/* ═══════════════════════════════════════════════════════
   Stats
   ═══════════════════════════════════════════════════════ */

.stats-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-lg);
  padding: var(--space-2xl) 0;
  border-top: 1px solid var(--border-dark);
  border-bottom: 1px solid var(--border-dark);
}

.stat-item { text-align: center; }

.stat-value {
  font-family: var(--font-mono);
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--accent);
  margin-bottom: 0.25rem;
}

.stat-label {
  font-size: 0.8125rem;
  color: var(--text-muted-light);
}


/* ═══════════════════════════════════════════════════════
   Accordion / FAQ
   ═══════════════════════════════════════════════════════ */

.accordion-item {
  border-bottom: 1px solid var(--border-dark);
}

.accordion-btn {
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 100%;
  padding: var(--space-md) 0;
  background: none;
  border: none;
  color: var(--text-heading-dark);
  font-size: 1.0625rem;
  font-weight: 500;
  text-align: left;
  cursor: pointer;
  transition: color var(--transition);
}

.accordion-btn:hover {
  color: var(--accent);
}

.accordion-icon {
  width: 20px;
  height: 20px;
  color: var(--text-muted-light);
  transition: transform 0.3s ease;
  flex-shrink: 0;
}

.accordion-item.open .accordion-icon {
  transform: rotate(45deg);
}

.accordion-content {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease;
}

.accordion-content-inner {
  padding-bottom: var(--space-lg);
  color: var(--text-muted-light);
  font-size: 0.9375rem;
  line-height: 1.8;
}

/* Light accordion variant */
.accordion-light .accordion-btn {
  color: var(--text-primary);
}

.accordion-light .accordion-item {
  border-color: var(--border-light);
}

.accordion-light .accordion-content-inner {
  color: var(--text-secondary);
}


/* ═══════════════════════════════════════════════════════
   CTA Banner
   ═══════════════════════════════════════════════════════ */

.cta-banner {
  text-align: center;
  padding: var(--space-4xl) var(--space-lg);
  position: relative;
  overflow: hidden;
}

.cta-banner::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 600px;
  height: 400px;
  background: radial-gradient(ellipse, rgba(59,130,246,0.08), transparent 70%);
  transform: translate(-50%, -50%);
  pointer-events: none;
}

.cta-banner h2 {
  margin-bottom: var(--space-sm);
  position: relative;
}

.cta-banner > p {
  color: var(--text-muted-light);
  margin-bottom: var(--space-xl);
  max-width: 550px;
  margin-left: auto;
  margin-right: auto;
  position: relative;
}

.cta-banner .btn-group {
  justify-content: center;
  position: relative;
}

.cta-contact {
  display: block;
  margin-top: var(--space-md);
  font-family: var(--font-mono);
  font-size: 0.875rem;
  color: var(--text-muted-light);
  position: relative;
}


/* ═══════════════════════════════════════════════════════
   Approach / Process Steps
   ═══════════════════════════════════════════════════════ */

.process-step {
  display: flex;
  gap: var(--space-lg);
  padding: var(--space-xl) 0;
  border-bottom: 1px solid var(--border-dark);
}

.process-step:last-child {
  border-bottom: none;
}

.process-step-num {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--accent);
  padding-top: 0.15rem;
  flex-shrink: 0;
  width: 30px;
}

.process-step h3 {
  color: var(--text-heading-dark);
  margin-bottom: var(--space-xs);
}

.process-step p {
  color: var(--text-muted-light);
  font-size: 0.9375rem;
  line-height: 1.7;
}


/* ═══════════════════════════════════════════════════════
   Architecture Diagram
   ═══════════════════════════════════════════════════════ */

.arch-diagram {
  background: var(--bg-secondary);
  border: 1px solid var(--border-dark);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
}

.arch-title {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--text-muted-light);
  margin-bottom: var(--space-lg);
  text-align: center;
}

.arch-layers {
  display: flex;
  flex-direction: column;
  gap: 0;
  max-width: 700px;
  margin: 0 auto;
}

.arch-layer {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-md) var(--space-lg);
  background: var(--bg-primary);
  border: 1px solid var(--border-dark);
  transition: all 0.3s ease;
  cursor: default;
}

.arch-layer:hover {
  border-color: var(--accent);
  background: rgba(59,130,246,0.03);
}

.arch-layer-label {
  font-family: var(--font-mono);
  font-size: 0.625rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-muted-light);
  width: 100px;
  flex-shrink: 0;
}

.arch-layer-items {
  display: flex;
  flex-wrap: wrap;
  gap: 0.375rem;
  flex: 1;
}

.arch-layer-items span {
  font-size: 0.75rem;
  padding: 0.3rem 0.625rem;
  background: var(--bg-card-dark);
  color: var(--text-muted-light);
  border-radius: 4px;
  border-left: 2px solid var(--accent);
  position: relative;
  cursor: default;
  transition: all 0.2s ease;
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
}

.arch-layer-items span svg {
  flex-shrink: 0;
  opacity: 0.6;
  transition: opacity 0.2s ease;
}

.arch-layer-items span:hover svg {
  opacity: 1;
}

.arch-layer-items span:hover {
  color: var(--text-light);
  background: rgba(59,130,246,0.08);
  transform: translateY(-1px);
}

/* Tooltips */
.arch-layer-items span[data-tip]::after {
  content: attr(data-tip);
  position: absolute;
  bottom: calc(100% + 8px);
  left: 50%;
  transform: translateX(-50%) scale(0.95);
  font-family: var(--font-sans);
  font-size: 0.6875rem;
  line-height: 1.5;
  color: var(--text-light);
  background: var(--bg-card-dark);
  border: 1px solid var(--border-dark);
  padding: 0.5rem 0.75rem;
  border-radius: 6px;
  white-space: nowrap;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s ease, transform 0.2s ease;
  z-index: 10;
}

.arch-layer-items span[data-tip]:hover::after {
  opacity: 1;
  transform: translateX(-50%) scale(1);
}

.arch-connector {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 24px;
  position: relative;
}

.arch-connector::before {
  content: '';
  width: 1px;
  height: 100%;
  background: var(--border-dark);
  position: absolute;
  left: 50%;
}

.arch-layer[data-color="blue"]:hover { border-color: var(--accent); }
.arch-layer[data-color="teal"]:hover { border-color: var(--accent-secondary); }
.arch-layer[data-color="purple"]:hover { border-color: var(--accent-muted); }
.arch-layer[data-color="amber"]:hover { border-color: #F59E0B; }

.arch-layer[data-color="blue"] .arch-layer-items span { border-left-color: var(--accent); }
.arch-layer[data-color="teal"] .arch-layer-items span { border-left-color: var(--accent-secondary); }
.arch-layer[data-color="purple"] .arch-layer-items span { border-left-color: var(--accent-muted); }
.arch-layer[data-color="amber"] .arch-layer-items span { border-left-color: #F59E0B; }


/* ═══════════════════════════════════════════════════════
   Contact Form
   ═══════════════════════════════════════════════════════ */

.form-group {
  margin-bottom: var(--space-md);
}

.form-label {
  display: block;
  font-size: 0.875rem;
  font-weight: 500;
  margin-bottom: 0.5rem;
}

.section-dark .form-label {
  color: var(--text-light);
}

.form-input,
.form-textarea {
  width: 100%;
  padding: 0.75rem 1rem;
  font-size: 0.9375rem;
  border-radius: var(--radius);
  border: 1px solid var(--border-dark);
  background: var(--bg-secondary);
  color: var(--text-light);
  font-family: var(--font-sans);
  transition: border-color var(--transition);
}

.form-input:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(59,130,246,0.1);
}

.form-textarea {
  min-height: 120px;
  resize: vertical;
}

.form-input::placeholder,
.form-textarea::placeholder {
  color: var(--text-muted-light);
  opacity: 0.6;
}

.form-required {
  color: var(--accent);
  font-weight: 400;
}

.form-hint {
  display: block;
  margin-top: 0.375rem;
  font-size: 0.8125rem;
  color: var(--text-muted-light);
}

/* ── Interest Selector (segmented button group) ── */
.interest-group {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.interest-option {
  cursor: pointer;
}

.interest-option input[type="radio"] {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.interest-label {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.625rem 1rem;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-muted-light);
  background: var(--bg-secondary);
  border: 1px solid var(--border-dark);
  border-radius: var(--radius);
  transition: all var(--transition);
  white-space: nowrap;
}

.interest-label:hover {
  border-color: var(--accent);
  color: var(--text-light);
}

.interest-option input[type="radio"]:focus-visible + .interest-label {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.interest-option input[type="radio"]:checked + .interest-label {
  background: rgba(59, 130, 246, 0.12);
  border-color: var(--accent);
  color: var(--accent);
}

.interest-label svg {
  flex-shrink: 0;
  opacity: 0.6;
  transition: opacity var(--transition);
}

.interest-option input[type="radio"]:checked + .interest-label svg {
  opacity: 1;
}

/* ── Form Messages ── */
.form-message {
  align-items: flex-start;
  gap: 0.75rem;
  padding: 0.875rem 1rem;
  border-radius: var(--radius);
  font-size: 0.875rem;
  line-height: 1.5;
  display: none;
}

.form-message.is-visible {
  display: flex;
}

.form-message-error {
  background: rgba(239, 68, 68, 0.1);
  border: 1px solid rgba(239, 68, 68, 0.3);
  color: #FCA5A5;
}

.form-message-error svg {
  flex-shrink: 0;
  color: #EF4444;
  margin-top: 1px;
}

.form-message-error a {
  color: #FCA5A5;
  text-decoration: underline;
}

/* ── Submit Button States ── */
.btn .btn-loading {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

.btn .btn-loading[hidden],
.btn .btn-text[hidden] {
  display: none;
}

.btn.is-loading .btn-arrow {
  display: none;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.spinner {
  animation: spin 0.8s linear infinite;
}

/* ── Form Success Panel ── */
.form-success {
  text-align: center;
  padding: var(--space-3xl) var(--space-xl);
  border: 1px solid var(--border-dark);
  border-radius: var(--radius-lg, 12px);
  background: var(--bg-secondary);
}

.form-success-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 64px;
  height: 64px;
  border-radius: 50%;
  background: rgba(59, 130, 246, 0.1);
  color: var(--accent);
  margin-bottom: var(--space-lg);
}

.form-success h3 {
  font-size: 1.375rem;
  color: var(--text-light);
  margin-bottom: var(--space-sm);
}

.form-success p {
  color: var(--text-muted-light);
  max-width: 400px;
  margin: 0 auto;
}

.form-success-secondary {
  margin-top: var(--space-lg) !important;
  font-size: 0.875rem;
}

.form-success-secondary a {
  color: var(--accent);
  text-decoration: none;
  font-weight: 500;
}

.form-success-secondary a:hover {
  text-decoration: underline;
}

/* Light form variant */
.form-light .form-input,
.form-light .form-textarea {
  border-color: var(--border-light);
  background: #fff;
  color: var(--text-primary);
}

.form-light .form-label {
  color: var(--text-primary);
}


/* ═══════════════════════════════════════════════════════
   Footer
   ═══════════════════════════════════════════════════════ */

.footer {
  background: var(--bg-primary);
  border-top: 1px solid var(--border-dark);
  padding: var(--space-3xl) var(--space-lg) var(--space-xl);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--space-2xl);
  max-width: var(--max-width);
  margin: 0 auto;
}

.footer-brand p {
  color: var(--text-muted-light);
  font-size: 0.875rem;
  line-height: 1.7;
  margin-top: var(--space-sm);
  max-width: 300px;
}

.footer h4 {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-muted-light);
  margin-bottom: var(--space-md);
}

.footer-links a {
  display: block;
  font-size: 0.875rem;
  color: var(--text-muted-light);
  padding: 0.25rem 0;
  transition: color var(--transition);
}

.footer-links a:hover {
  color: var(--text-light);
}

.footer-bottom {
  max-width: var(--max-width);
  margin: var(--space-2xl) auto 0;
  padding-top: var(--space-lg);
  border-top: 1px solid var(--border-dark);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.8125rem;
  color: var(--text-muted-light);
}


/* ═══════════════════════════════════════════════════════
   Solution Cards
   ═══════════════════════════════════════════════════════ */

.solution-card {
  display: block;
  border: 1px solid var(--border-dark);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  transition: all 0.3s ease;
}

.solution-card:hover {
  border-color: var(--accent);
  background: rgba(59,130,246,0.03);
  transform: translateY(-2px);
}

.solution-card h3 {
  color: var(--text-heading-dark);
  font-size: 1.125rem;
  margin-bottom: 0.5rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.solution-card p {
  color: var(--text-muted-light);
  font-size: 0.9375rem;
  line-height: 1.7;
}

.solution-card .external-icon {
  opacity: 0.4;
  transition: opacity var(--transition);
}

.solution-card:hover .external-icon {
  opacity: 1;
}


/* ═══════════════════════════════════════════════════════
   Insights / Blog Preview Cards
   ═══════════════════════════════════════════════════════ */

/* Insights grid — 3-col desktop, 2-col tablet, 1-col mobile */
.insights-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-xl);
}

.insight-card {
  background: var(--bg-card-dark);
  border: 1px solid var(--border-dark);
  border-radius: var(--radius-lg);
  padding: var(--space-xl) var(--space-xl) var(--space-lg);
  transition: all 0.3s ease;
  display: flex;
  flex-direction: column;
}

.insight-card:hover {
  border-color: rgba(59,130,246,0.3);
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(0,0,0,0.25);
}

.insight-category {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: var(--space-md);
}

.insight-card h3 {
  color: var(--text-heading-dark);
  margin-bottom: var(--space-sm);
  font-size: 1.125rem;
  line-height: 1.4;
}

.insight-card p {
  color: var(--text-muted-light);
  font-size: 0.875rem;
  line-height: 1.7;
  margin-bottom: var(--space-lg);
  flex-grow: 1;
}

.insight-link {
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--text-light);
  transition: color var(--transition);
}

.insight-card:hover .insight-link {
  color: var(--accent);
}

.insights-footer {
  text-align: center;
  margin-top: var(--space-3xl);
  padding-top: var(--space-xl);
  border-top: 1px solid var(--border-dark);
}

.insights-footer p {
  font-size: 0.9375rem;
  margin-bottom: var(--space-md);
}


/* ═══════════════════════════════════════════════════════
   Scroll Reveal
   ═══════════════════════════════════════════════════════ */

.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.7s cubic-bezier(0.16, 1, 0.3, 1), transform 0.7s cubic-bezier(0.16, 1, 0.3, 1);
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }
.reveal-delay-4 { transition-delay: 0.35s; }


/* ═══════════════════════════════════════════════════════
   Divider
   ═══════════════════════════════════════════════════════ */

.divider-dark {
  border: none;
  border-top: 1px solid var(--border-dark);
  margin: 0;
}

.divider-light {
  border: none;
  border-top: 1px solid var(--border-light);
  margin: 0;
}


/* ═══════════════════════════════════════════════════════
   Capability Strip (under hero)
   ═══════════════════════════════════════════════════════ */

.capability-strip {
  position: relative;
  z-index: 10;
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 0;
  padding: var(--space-lg) var(--space-lg);
  margin-top: auto;
  background: rgba(17, 24, 39, 0.6);
  border-top: 1px solid var(--border-dark);
  width: 100%;
}

.capability-strip-item {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  padding: 0 var(--space-xl);
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  color: var(--text-light);
  transition: color 0.3s ease;
  text-decoration: none;
  white-space: nowrap;
}

.capability-strip-item:hover {
  color: var(--accent);
}

.capability-strip-item svg {
  flex-shrink: 0;
  opacity: 0.5;
}

.capability-strip-item:hover svg {
  opacity: 1;
}

.capability-strip-divider {
  width: 1px;
  height: 24px;
  background: var(--border-dark);
  flex-shrink: 0;
}


/* ═══════════════════════════════════════════════════════
   Platform Showcase (elevated solution cards)
   ═══════════════════════════════════════════════════════ */

.platform-card {
  display: flex;
  flex-direction: column;
  border: 1px solid var(--border-dark);
  border-radius: var(--radius-lg);
  padding: var(--space-2xl);
  transition: all 0.3s ease;
  background: var(--bg-card-dark);
  text-decoration: none;
  position: relative;
  overflow: hidden;
}

.platform-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--accent), var(--accent-secondary));
  opacity: 0;
  transition: opacity 0.3s ease;
}

.platform-card:hover {
  border-color: rgba(59,130,246,0.4);
  transform: translateY(-4px);
  box-shadow: 0 16px 48px rgba(0,0,0,0.3), var(--shadow-glow);
}

.platform-card:hover::before {
  opacity: 1;
}

.platform-card-name {
  font-family: var(--font-mono);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-heading-dark);
  margin-bottom: var(--space-sm);
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.platform-card-name .external-icon {
  opacity: 0.3;
  transition: opacity var(--transition);
}

.platform-card:hover .platform-card-name .external-icon {
  opacity: 1;
}

.platform-card-desc {
  color: var(--text-muted-light);
  font-size: 1rem;
  line-height: 1.7;
  margin-bottom: var(--space-lg);
  flex: 1;
}

.platform-card-tech {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.platform-card-tech span {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  padding: 0.3rem 0.75rem;
  border-radius: 4px;
  background: rgba(59,130,246,0.08);
  color: var(--accent);
  border: 1px solid rgba(59,130,246,0.12);
  letter-spacing: 0.03em;
}


/* ═══════════════════════════════════════════════════════
   Responsive
   ═══════════════════════════════════════════════════════ */

@media (max-width: 1024px) {
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .insights-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: var(--space-xl); }
  .stats-row { grid-template-columns: repeat(2, 1fr); }
  .capability-strip { flex-wrap: wrap; gap: var(--space-sm); }
  .capability-strip-divider { display: none; }
  .capability-strip-item { padding: 0.5rem var(--space-md); }
}

@media (max-width: 768px) {
  .grid-2 { grid-template-columns: 1fr; }
  .grid-3 { grid-template-columns: 1fr; }
  .grid-4 { grid-template-columns: 1fr; }
  .insights-grid { grid-template-columns: 1fr; }
  .grid-1-1 { grid-template-columns: 1fr; }
  .grid-2-1 { grid-template-columns: 1fr; }
  .hero { min-height: auto; padding: 7rem var(--space-md) 0; }
  .hero-actions { flex-direction: column; align-items: stretch; }
  .hero-actions .btn { justify-content: center; }
  .engagement-card-body { grid-template-columns: 1fr; }
  .stats-row { grid-template-columns: 1fr 1fr; }
  .section { padding: var(--space-3xl) var(--space-md); }
  .page-header { padding: 6rem var(--space-md) var(--space-xl); }
  .capability-strip { padding: var(--space-md); }
  .capability-strip-item { font-size: 0.75rem; padding: 0.375rem var(--space-sm); }
}

@media (max-width: 640px) {
  .nav { padding: 0.75rem 1rem; }
  .nav-links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    background: rgba(11, 15, 20, 0.98);
    border-bottom: 1px solid var(--border-dark);
    padding: 1.5rem;
    gap: 1rem;
  }
  .nav-links.open { display: flex; }
  .nav-toggle { display: block; }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; gap: 0.5rem; text-align: center; }
  .stats-row { grid-template-columns: 1fr; }
  .btn-group { flex-direction: column; align-items: stretch; }
  .btn-group .btn { justify-content: center; }
  .arch-layer { flex-direction: column; align-items: flex-start; gap: 0.5rem; }
  .arch-layer-label { width: auto; }
  .capability-strip { flex-direction: column; gap: 0; }
  .capability-strip-item { padding: 0.5rem 0; justify-content: center; }
  .platform-card { padding: var(--space-xl); }
  .interest-group { flex-direction: column; }
  .interest-label { justify-content: center; }
}